STMicroelectronics 32L4R9IDISCOVERY, Руководство пользователя

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UM2271 Connectors
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11.12 Stereo headset and headphone jack CN12
A stereo headphone or a stereo headset with analog microphone is pluggable into the
3.5 mm standard jack socket CN12.
Figure 19. Stereo headset with microphone jack CN12
If a headset is plugged into CN12, the bias of the microphone is driven by the output
MICBIAS1 of the codec and the analog audio enters into the codec by the pin AIN3A.
Table 27. Audio jack connector CN12
Pin number Description Stereo headset with microphone pinning
6 OUT_Left SPK_L (33 ohms typ.)
4 OUT_Right SPK_R (33 ohms typ.)
3 GND GND
2 IN_Analog Microphone
5 NC
NA
1 NC
06Y9
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